This is to anyone who knows how to tweak inside XWA - I found that my computer, oddly, can't handle further away, low detail models (of SD's, for example), but when I get close enough that it switches to the complex model, the game is perfectly smooth (this is so even when I am not too close that other objects are blocked from view - therefore it is not a simple problem of 'too much to render'). Nevertheless, setting "Use low detail models" to as "far" as it allows me isn't enough. Anyone, any ideas?
Thanks to anyone who offers anything.